Lifting tree

ABSTRACT

A lifting tree for a Christmas tree includes a trunk consisting of a base cylinder with an upper opening and a lifting cylinder set. The lifting cylinder set includes a plurality of hollow lifting cylinders coupling vertically in sequence and two adjacent lifting cylinders that can move relatively. A limiting structure is arranged between two adjacent lifting cylinders to prevent separation. The lifting cylinder at bottom is coupled with the base cylinder in which a linear module is provided, which includes a mobile unit connected to the lifting cylinder at the top of lifting cylinder set in a fixed position. At the top of each lifting cylinder, there is a connecting piece for connecting branches.

FIELD OF THE INVENTION

This invention belongs to the technical field of decoration tree, and inparticular, it relates to a lifting tree used for Christmas trees.

BACKGROUND

In Europe and America, a Christmas tree as a Christmas decoration, iswidely used. Recently, people become environmentally conscious ofreplacing a previously used plant tree with an industrial Christmastree, to make it more environmentally friendly. However, a Christmastree is not easy to move, and in order to facilitate the movement,separate structures are adopted for the Christmas tree, to divide thetrunk into multiple segments, which can resolve the problem of largevolume, but when under assembly, it will take a long time because of toomany parts and components.

SUMMARY OF THE INVENTION

The object of the invention is to solve the problem of prior art andprovide a lifting tree, which can use space flexibly and its volume canbe varied, to facilitate transportation and easy to use.

The technical solutions adopted in this invention are as follows:

A lifting tree comprises a trunk consisting of a base cylinder with anupper opening and a lifting cylinder set, wherein the lifting cylinderset comprises a plurality of hollow lifting cylinders which couplevertically in sequence and two adjacent lifting cylinders that can moverelatively. A limiting structure is arranged between two adjacentlifting cylinders to prevent separation; and the lifting cylinder at thebottom is coupled with the base cylinder and a linear module is providedinside the base cylinder. The linear module comprises a mobile unitwhich is connected with the lifting cylinder at the top of liftingcylinder set fixedly, and at the upper end of each lifting cylinder isconnected to a connecting piece for connecting branches.

Further, the limiting structure includes a limit bump arranged at thelower end of the lifting cylinder, and the inner cylinder upper end ofthe lifting cylinder is provided with a convex ring protruding inwardly.

As an equivalent, the inner cylinder of the lifting cylinder is arrangedin stairs, including two cylindrical spaces, and the one space belowhave a large outer diameter; and the lower end of the lifting cylinderis arranged in a hollow cone shape. When matching between two adjacentlifting cylinders, the lower end of the lifting cylinder located aboveis matched with the lower cylindrical space of the lifting cylinderlocated below.

Further, the linear module comprises a screw and a hollow sleeve openingat the lower end, and the hollow sleeve includes internal threads toconnect with the screw thread, and the upper end of the hollow sleeve isconnected with the lifting cylinder located at the top; and the basecylinder is provided with a motor which connects with the screw in adrive way.

Further, a transmission is provided inside the base cylinder and themotor shaft is connected with the screw by the transmission.

Preferably, the transmission comprises a driving gear and a driven gear.The motor shaft is connected with the driving gear, and the driven gearis connected with the screw.

Further, the linear module includes the cylinder, and the push rod ofthe cylinder is connected with the lifting cylinder at the top of thelifting cylinder set.

Further, the connecting piece comprises a fixing portion connected tothe lifting cylinder and a connection portion for connection with aplurality of branches, and the connection portion is arranged on theouter surface of the fixing portion in an annular way.

Still further, the fixing portion is a collar, the connection portion isthe connection piece, and the middle of the connection piece is providedwith a mounting hole for fixing the branches.

As the equivalent, the fixing portion includes a clamp which is fixedlyconnected with the lifting cylinder; moreover, the connection portioncan be a connecting tube arranged obliquely, and one end of theconnecting tube is fixed to the clamp.

Further, the side of the base cylinder is connected to a plurality ofsupporting legs.

Still further, the supporting leg comprises a curved supporting bar anda stiffener, and one side of the stiffener is fixed to the basecylinder, and the other end is fixed to the supporting bar.

Further, the motor is a servo motor, and the base cylinder is equippedwith a servo drive, which is connected to a wireless receiverelectrically.

This invention can achieve the beneficial effect. By using the liftingcylinder set to form telescopic trunk, the volume of the entire tree canbe changed, easy to transport and use.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of a lifting tree.

FIG. 2 is a schematic view of the trunk of a lifting tree.

FIG. 3 is a schematic view of the linear module of a lifting tree.

FIG. 4 is a matching schematic of two adjacent lifting cylinders of alifting tree.

FIG. 5 is another matching schematic of two adjacent lifting cylindersof a lifting tree.

NOTES

1—base cylinder; 2—lifting cylinder; 21—limit bump; 22—convex ring;3—fixing portion; 4—connection portion; 41—mounting hole; 5—branches;6—supporting leg; 7—stiffener; 8—wireless receiver; 9—motor; 10—shaft;11—transmission; 12—screw; 13—hollow sleeve; 23—fixture block;24—lifting groove.

DETAILED DESCRIPTION OF THE INVENTION

This invention is further described in combination with drawings andspecific embodiments.

EXAMPLE 1

Referring to FIGS. 1-3, a lifting tree comprises a trunk consisting of abase cylinder 1 with an upper opening and a lifting cylinder set, wherethe lifting cylinder set comprises a plurality of hollow liftingcylinders 2 which couple vertically in sequence and two adjacent liftingcylinders 2 that can move relatively. A limiting structure is arrangedbetween two adjacent lifting cylinders 2 to prevent separation; and thelifting cylinder 2 at the bottom is coupled with the base cylinder 1 anda linear module is provided inside the base cylinder 1. The linearmodule comprises a mobile unit which is connected with the liftingcylinder 2 at the top of lifting cylinder set fixedly, and at the upperend of each lifting cylinder 2 is connected to a connecting piece forconnecting branches 5.

The lifting tree in the technical solution adopts a coupling way to forma lifting structure. The lifting cylinder 2 is coupled vertically toform a telescopic antenna structure. During transport, the trunk partcan be shrunk to reduce the height of the trunk and reduce its volume.When in use, the trunk is lifted by the linear module, the branch 5 isfixed to the connecting piece, thus forming a complete Christmas treeand making the Christmas tree easy to transport and use. In order toprevent the separation of two adjacent lifting cylinders 2 during use, alimiting structure is arranged between two lifting cylinders 2. Thelifting cylinder 2 located the bottom can be tightly fit with the basecylinder 1, or can be slid relative to the base cylinder 1.

Referring to FIG. 4, further, the limiting structure includes a limitbump 21 arranged at the lower end of the lifting cylinder 2, and theinner cylinder upper end of the lifting cylinder 2 is provided with aconvex ring 22 protruding inwardly.

When mounting the two adjacent lifting cylinders 2, the lifting cylinder2 located above is inserted from the lower part of inner cylinder oflifting cylinder 2 located below and pass through from the upper part;at this time, the limit bump 21 of the lifting cylinder 2 located aboveis abutted against the inner cylinder of the lifting cylinder 2 locatedbelow, and the outside side wall of the lifting cylinder 2 located aboveis abutted against the convex ring 22 of the lifting cylinder 2 locatedbelow. During use, when the lifting cylinder 2 located above isrelatively lifted to a position, the limit bump 21 is abutted againstthe convex ring 22, to limit its lifting. When descending, since thelifting cylinder 2 located above is mounted with connecting piece, theconnecting piece is abutted against the lifting cylinder 2 located belowwhen descending to a position, to achieve the limit.

As an equivalent, the inner cylinder of the lifting cylinder 2 isarranged in stairs, including two cylindrical spaces, and the one spacebelow have a large outer diameter; and the lower end of the liftingcylinder 2 is arranged in a hollow cone shape. When matching between twoadjacent lifting cylinders 2, the lower end of the lifting cylinder 2located above is matched with the lower cylindrical space of the liftingcylinder 2 located below.

Referring to FIG. 5, the limiting structure includes a lifting groove 24arranged at the inner cylinder of the lifting cylinder 2 and the uppersealing of the lifting groove 24; The lower end of the lifting cylinder2 is provided with a fixture block 23 matching with the lifting groove24.

Referring to FIG. 3, further, the linear module comprises a screw 12 anda hollow sleeve 13 with opening at the lower end, and the hollow sleeve13 includes internal threads to connect with the screw thread 12, andthe upper end of the hollow sleeve 13 is connected with the liftingcylinder 2 located at the top; and the base cylinder 1 is provided witha motor 9 which connects with the screw 12 in a drive way.

During the implementation, the upper end of hollow sleeve 13sequentially passes through all lifting cylinders 2 other than the oneat the top, and the upper end of the hollow sleeve 13 is abutted againstor fixedly connected with the lifting cylinder 2 located at the top;when the lifting tree needs rise, the motor 9 drives the screw 12 andthe hollow sleeve 13 rises relative to the screw 12, and the hollowsleeve 13 drives the lifting cylinder 2 located at the top to rise andother lifting cylinders 2 to rise sequentially from bottom to the top.In order to prevent the rotating of hollow sleeve 13 along the screw 12,a limit bump is arranged at the side of the hollow sleeve 13 or thehollow sleeve 13 is fixedly connected to the lifting cylinder 2 locatedat the top. When descending, the screw 12 drives the hollow sleeve 13 todescend, and the lifting cylinder 2 can move downwardly under gravityuntil the lifting cylinder 2 at the top is abutted against the hollowsleeve 13. When the hollow sleeve 13 is fixedly connected with thelifting cylinder 2 at the top, the lifting cylinder 2 can movedownwardly driven by the hollow sleeve 13.

Further, a transmission 11 is provided inside the base cylinder 1 andthe motor shaft 10 of the motor 9 is connected with the screw 12 by thetransmission 11.

Since the motor 9 has a fast speed, when the screw 12 is driven by themotor 9 directly to rotate, the hollow sleeve 13 lifts quickly,difficult to control. In order to control the lifting speed, atransmission 11 is provided inside the base cylinder 1, to reduce thedrive speed of motor 9. In addition, a transmission 11 is provided tofacilitate the setting of the location of motor 9. The orientation ofthe shaft 10 of motor 9 can be arbitrarily set for easy installation.

Preferably, the transmission 11 comprises a driving gear and a drivengear. The motor shaft 10 of the motor 9 is connected with the drivinggear, and the driven gear is connected with the screw 12.

As an equivalent, further, the linear module includes the cylinder, andthe push rod of the cylinder is connected with the lifting cylinder 2 atthe top of the lifting cylinder set.

The lifting of the push rod of the lifting cylinder can achieve controlon the stretching of the lifting cylinder set.

Further, the connecting piece comprises a fixing portion 23 connected tothe lifting cylinder 2 and a connection portion 4 for connection with aplurality of branches 5, and the connection portion 4 is arranged on theouter surface of the fixing portion 23 in an annular way.

Still further, the fixing portion is a collar 23, the connection portion4 is the connection piece, and the middle of the connection piece isprovided with a mounting hole 41 for fixing the branches 5.

For fixing the connecting piece to the lifting cylinder 2, theconnecting piece adopts a collar structure. Preferably, the collar andlifting cylinder 2 are tight fit. The connection piece is arranged atthe surface of the collar in an annular way; the mounting hole of theconnection piece is connected with the branches 5, to form a completeChristmas tree.

As the equivalent, the fixing portion 23 includes a clamp, which isfixedly connected with the lifting cylinder 2; moreover, the connectionportion 4 can be a connecting tube arranged obliquely, and one end ofthe connecting tube is fixed to the clamp.

The connecting piece can be easily fixed to the lifting cylinder 2 usinga clamp structure, to adjust the tightness and avoid the loosenesscaused by fatigue deformation for a long-term use. In addition, theconnection portion 4 can adopt a connection tube, which can be connectedwith the branches 5 in a plug way, more simple and convenient. Theabove-mentioned fixing portion 23 and connection portion 4 can beinterchanged and used in combination.

Further, the side of the base cylinder 1 is connected to a plurality ofsupporting legs 6.

Still further, the plurality of supporting leg 6 comprises a curvedsupporting bar and a stiffener 7, and one side of the stiffener 7 isfixed to the base cylinder 1, and the other end is fixed to thesupporting bar.

Further, the motor 9 is a servo motor 10, and the base cylinder 1 isequipped with a servo drive, which is connected to a wireless receiver 8electrically.

The control on the lifting of the lifting tree can be achieved by awireless controller; the wireless controller sends control signals tothe wireless receiver 8 which then sends the control signals to theservo drive, to control the rotation state of the servo motor 9. Thewireless receiver 8 can be an infrared receiver, Bluetooth receiver,etc.

The invention has been described in detail. Technicians skilled in theart should know that the technical solutions can be modified orsubstituted equivalently without departing from the spirit and scope ofthem.

1. A lifting tree, comprising: a trunk consisting of a base cylinderwith an upper opening and a lifting cylinder set, wherein the liftingcylinder set comprises a plurality of hollow lifting cylinders whichcouple vertically in sequence and two adjacent lifting cylindersconfigured to move relatively; and a limiting structure arranged betweentwo adjacent lifting cylinders to prevent separation; wherein thelifting cylinder at the bottom is coupled with the base cylinder and alinear module is provided inside the base cylinder; the linear modulecomprises a mobile unit which is connected with the lifting cylinder atthe top of the lifting cylinder set fixedly, and the upper end of eachlifting cylinder is connected to a connecting piece for connectingbranches.
 2. The lifting tree according to claim 1, wherein the limitingstructure comprises a limit bump arranged at the lower end of thelifting cylinder, and the inner cylinder upper end of the liftingcylinder is provided with a convex ring protruding inwardly.
 3. Thelifting tree according to claim 1, wherein the linear module comprises ascrew and a hollow sleeve opening at the lower end, and the hollowsleeve includes internal threads to connect with the screw thread, andthe upper end of the hollow sleeve is connected with the liftingcylinder located at the top; and the base cylinder is provided with amotor which connects with the screw in a drive way.
 4. The lifting treeaccording to claim 3, wherein a transmission is provided inside the basecylinder and a motor shaft is connected with the screw by thetransmission.
 5. The lifting tree according to claim 1, wherein theconnecting piece comprises a fixing portion connected to the liftingcylinder and a connection portion for connection with a plurality ofbranches, and the connection portion is arranged on the outer surface ofthe fixing portion in an annular way.
 6. The lifting tree according toclaim 5, wherein the fixing portion is a collar, the connection portionis a connection piece, and the middle of the connection piece isprovided with a mounting hole for fixing the branches.
 7. The liftingtree according to claim 1, wherein the side of the base cylinder isconnected to a plurality of supporting legs.
 8. The lifting treeaccording to claim 7, wherein the supporting leg comprises a curvedsupporting bar and a stiffener, and a first end of the stiffener isfixed to the base cylinder, and a second end is fixed to the supportingbar.
 9. The lifting tree according to claim 3, wherein the motor is aservo motor, and the base cylinder is equipped with a servo driveconnected to a wireless receiver electrically.